Adjustable pipe union



.'Sept. 21, 1948. F R, CLAFFORD 2,449,588

ADJUSTABLE PIPE UNION Filed Aug. l5, 1946 Haro urnurp Patented Sept. 2 1, 1948 Floyd R. Claiord, Park Ridge, Ill.

j. i yiipplicatioinAugust 13, 1946, Serial No. 690,110

2 Claims.

" "The present inventionvrelates to pipe unions and is more particularly concerned" with van adinstableV pipe union.

The primary object `of the invention is to provide a device ofthe character referred to which.:

wllprevent the strain caused-by use of anV ordinary pipe union. f I

Strains are usually introduced on pipe lines by screw threadpipe ttings and cause premature failure of other pipe fittings, such as those related I to stuflling boxes and valves, due to disruption of essentialv alignment.` This device will obviate that fault.

Another object of the invention is to provide an adjustable union which will afford uniform tension or pressure on multiple piping, thus eliminating leaks caused by the distortion resulting from the aforesaid piping strains. leaks in glands, headers, stuing boxes, valves, gauges and other instruments.

Still another object of the invention is to produce an adjustable pipe union which will reduce maintenance costs and is of simpler and more compact contruction than prior devices.

With the foregoing and other objects and advantages in view the invention consists of the novel construction and arrangement of parts hereinafter described and claimed.

In the accompanying drawings illustrating the invention,

Figure 1 is a side elevation of the device,

Figure 2 is a longitudinal section thereof,

Figure 3 is a transverse section on line 3-3 of Figure 1,

Figure 4 is an end elevation of the device.

Like numerals, as used in the description and drawings, designate the same parts tion.

I is the barrel ofthe pipe union and comprises a tubular element straight threaded externally at each end, as at I'I. It is also threaded internally at one end, as at I2. At the opposite end the bore is cut away, as at I3, so as to provide an annular recess to contain a copper bushing I4. Intermediate threaded portions II the barrel is formed with an hexagonal enlargement I5 to hold a pipe wrench. Contiguous to the internal threads I2, the barrel is provided with a bevel to the outer end.

Seated freely in the bevel is a beveled tubular tail piece or pipe I6 with exterior iiats adjacent the outer end to provide a wrench hold. This end is a female element threaded internally, as at I'I. The bevel I8 on the tail piece is more acute than the bevel in the barrel end and there is a slight They cause of construc- (Cl. 28s-2o I I 'clearance betweenthe tail piece andthe opening in the body. Exteriorly the tail piece has a circular flange I9. Atail piece unionnut 20, with I an hexagonal `exterior 2 I, is provided with interior threads designed to engage the threads I I on the ffoutside of` this end of barrel I0.

LBetween the interior `threads of the tail piece nut and the outerwend, the bore of said nut is `constricted andsmooth` to fit freelyv on the tail piece and impinge the ange thereof. The internal diametercf the tail piecenut, where `the Wthreads occur, is sufficient to provide clearance the bore of which is somewhat less in diameter than the bore of tail piece I6. It is of pipe size with a male thread 23, externally, for a suitable distance from the outer end, the diameter of said threads being less than those which engage the barrel. Mounted on member 22 for free engagement with a smooth portion between the two threaded portions, is an hexagonal body union nut 24 threaded interiorly to engage the adjacent threads on the barrel I0, with tolerance for purposes of adjustment. The interior end wall of nut 24 impinges the contiguous end ofcopper bushing I4mounted within the annular recess I3 of the barrel I0 and serves to force same into said recess resulting in causing a seal to be made be-` tween the beveled end of said bushing and adjacent beveled surface at bottom of recess as shown. Nut 24, together with bushing I4, further serves to hold tubular member 22 in proper coaxial alignment with barrel I0. The end of the bushing and the adjacent end of said recess may be beveled, as shown, to facilitate adjustment of the foregoing.

An adjusting lock nut 25, with hexagonal exterior surface, is threaded on member 22 to impinge the body union nut 24, thus serving in assoi ciation with the nut 20, to fasten the assembly together as an operative unit. Diametrically disposed flats 26 on the member 22 intermediate the end and said lock nut 25, are provided for the application of a wrench to turn the said member on its threads. (The adjustment is accomplished by turning piece 22 in or out on threads at I2 thus scribed, it Will be understood that the matter herein is to be interpreted as illustrative merely, and not in a limiting sense.

What I claim is:

1. A pipe union for connectingianzend-Lot. a pipe to a tail pipe, comprising a tail piece nut adapted to be mounted upon said tail pipe, saidrnutfdona portion of its length being interiorly threaded, a

barrel exteriorly threaded for a,ftptzsrtion` Y of?. its length, i adjacent eachf ofr itsaends adaptedI to; `be @mounted uponI said pipe, .oneiof the threadedzends fof ysaid-barrel -beingV in .threadedzengagement with .1 the zthreadedportionl of r. said nut; aie-second anni@ 25 adapted to be mounted for;4 rotational 4-n'iovement tionv of; its` length being;interiorlygthreaded;fthe .threaded portioniof saidxsecondienamed nut-being movable upon;rotationiinto` threaded engagementii ivvith` the 4other threadedzendrosaid.:.barre1;;and .means for lockingsaid'second+named nutzin posi- 4 2. A pipe union for connecting an end of a pipe to a tail pipe, comprising a tail piece nut adapted to be mounted upon said tail pipe, said nut for a portion of its length being interiorly threaded,

5 a barrel exteriorly threaded for a portion of its length adjacent each of its ends adapted to be mounted upon sadpipe, one of the threaded ends of said barrel being in threaded engagement with the threaded portion of said nut, a second nut 10:. adapted-:fte yfbei'imounte'd iorf' rotational'zjmovement jrupon-i said pipe; saidlastenamednutfor a portion of its length being interiorly threaded, the -,.--threaded portion of said second-named nut being movable upon rotation into threaded engagement 5 with the other threaded end of said barrel, said r1.ebarre1sbeing cut away contiguous to said other ,threaded endso as to provide an annular recess,

abushing surrounding said pipe and positioned iz'-w.ithin.;said recess for securing said second-named nut in coaxial alignment with said barrel, and Wmeans` for locking. said secondenamednut .in-.posiationronnsaid pipe. f FLOYD-.Rf CLAFFORDL 'REFERENCES'CITED ifa'he follow-ingy references.- yare. of record sin .the

le of this patent:

FOREIGN PATENTS 

